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Electronics Worksheet: Electronic Components

Electronics lesson 17: Electronic components · Set 223 · 40 questions
TalentJR

Remember (One part, one job): Resistor: limits current. Capacitor: stores a little charge. Diode: one way only. LED: one way and glows. Buzzer: sound. Motor: spinning. Potentiometer: a knob that changes resistance. LDR: light sensor. Thermistor: heat sensor. Fuse: protects by blowing. Transistor: boosts or switches.

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  1. 1.🧩 Which component makes things spin? (a) diode (b) motor (c) thermistor (d) buzzer
  2. 2.🧩 Which component has coloured bands? (a) buzzer (b) transistor (c) motor (d) resistor
  3. 3.True or false: a transistor boosts a small signal. (a) False (b) True
  4. 4.What does an LED do? (a) is a resistance knob (b) glows using little power (c) makes things spin (d) lets current go one way
  5. 5.True or false: a diode makes a beeping sound. (a) False (b) True
  6. 6.🧩 A capacitor in a circuit can … (a) measure heat (b) spin a wheel (c) make light (d) store charge briefly
  7. 7.What does a motor do? (a) blows if current is high (b) smooths a wobbly supply (c) glows using little power (d) makes things spin
  8. 8.True or false: an LDR senses how bright it is. (a) True (b) False
  9. 9.🧩 Which part changes electrical energy into sound? (a) a resistor (b) a capacitor (c) a diode (d) a buzzer
  10. 10.🧩 Which component boosts a small signal? (a) LED (b) capacitor (c) transistor (d) thermistor
  11. 11.What does a potentiometer do? (a) blows if current is high (b) lets current go one way (c) is a resistance knob (d) turns a fan or wheels
  12. 12.True or false: an LDR makes things spin. (a) False (b) True
  13. 13.True or false: a capacitor smooths a wobbly supply. (a) False (b) True
  14. 14.🧩 Which component lets current go one way? (a) resistor (b) LED (c) LDR (d) diode
  15. 15.What does a thermistor do? (a) turns a fan or wheels (b) senses how hot it is (c) has coloured bands (d) limits the current
  16. 16.🧩 Which component senses how bright it is? (a) thermistor (b) LDR (c) potentiometer (d) fuse
  17. 17.What does a transistor do? (a) boosts a small signal (b) has coloured bands (c) senses how hot it is (d) blows if current is high
  18. 18.True or false: a motor limits the current. (a) True (b) False
  19. 19.What does a resistor do? (a) glows using little power (b) senses how hot it is (c) limits the current (d) blows if current is high
  20. 20.🧩 Which component limits the current? (a) LDR (b) capacitor (c) resistor (d) diode
  21. 21.🧩 Which component beeps for an alarm? (a) thermistor (b) LDR (c) buzzer (d) diode
  22. 22.What does a resistor do? (a) smooths a wobbly supply (b) blows if current is high (c) has coloured bands (d) lets current go one way
  23. 23.What does a capacitor do? (a) makes things spin (b) smooths a wobbly supply (c) has coloured bands (d) blows if current is high
  24. 24.What does a capacitor do? (a) makes things spin (b) has coloured bands (c) blows if current is high (d) stores a little charge
  25. 25.True or false: a capacitor makes things spin. (a) True (b) False
  26. 26.🧩 Which component smooths a wobbly supply? (a) motor (b) capacitor (c) thermistor (d) fuse
  27. 27.True or false: a motor makes a beeping sound. (a) False (b) True
  28. 28.True or false: a resistor has coloured bands. (a) False (b) True
  29. 29.True or false: an LED glows using little power. (a) False (b) True
  30. 30.What does a buzzer do? (a) stores a little charge (b) lets current go one way (c) makes a beeping sound (d) has coloured bands
  31. 31.🧩 Which component stores a little charge? (a) LED (b) capacitor (c) buzzer (d) transistor
  32. 32.🧩 Which part changes electrical energy into movement? (a) an LED (b) a resistor (c) a motor (d) a fuse
  33. 33.True or false: a diode lets current go one way. (a) True (b) False
  34. 34.True or false: a thermistor senses how bright it is. (a) True (b) False
  35. 35.True or false: a potentiometer is a resistance knob. (a) True (b) False
  36. 36.🧩 Which component glows using little power? (a) capacitor (b) LED (c) fuse (d) diode
  37. 37.True or false: a resistor limits the current. (a) False (b) True
  38. 38.True or false: a capacitor stores a little charge. (a) False (b) True
  39. 39.True or false: a buzzer beeps for an alarm. (a) True (b) False
  40. 40.🧩 Which component turns a fan or wheels? (a) fuse (b) buzzer (c) motor (d) potentiometer

Answer key

  1. motor
  2. resistor
  3. True
  4. glows using little power
  5. False
  6. store charge briefly
  7. makes things spin
  8. True
  9. a buzzer
  10. transistor
  11. is a resistance knob
  12. False
  13. True
  14. diode
  15. senses how hot it is
  16. LDR
  17. boosts a small signal
  18. False
  19. limits the current
  20. resistor
  21. buzzer
  22. has coloured bands
  23. smooths a wobbly supply
  24. stores a little charge
  25. False
  26. capacitor
  27. False
  28. True
  29. True
  30. makes a beeping sound
  31. capacitor
  32. a motor
  33. True
  34. False
  35. True
  36. LED
  37. True
  38. True
  39. True
  40. motor

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